<template>
        <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="content" @keyup.enter="addContent"/>
      </div>
</template>

<script>
import { nanoid } from 'nanoid'
export default {
name:'MyHeader',
props:['addTodo'],
data(){
  return{
    content:'',
  }
},
methods:{
  //将输入的值添加到列表中
  addContent(){
    if(!this.content.trim())  return alert('输入不能为空!');
    const todoObj ={id:nanoid(),name:this.content,done:false};
    this.addTodo(todoObj);
    this.content='';
  }
}
}
</script>

<style scoped>
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}
</style>